Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8cecaaf18550d0…

MALICIOUS

PDF

79.9 KB Created: 2021-06-26 19:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 78744e02de843d3cf2ee5a08a0842851 SHA-1: e35e2af4ca50d1cf3f8fcd335c40bac54ace1103 SHA-256: 0a8cecaaf18550d099dc82cbd41c93010f40433ded08e24d0dc14986d7115a4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of numerous external links and the nature of the hosting used are strong indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://dyglas.com/userData/board/file/jatoveponirirobixiv.pdf In PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086d1d515a68---sodibigipadamugonadi.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609baeaf2d0eb---67469423508.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087742704fe8---4177958669.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/jizisorobaz.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/lomopi.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160893efeb127c---kozovoniwep.pdfIn PDF document text
    • https://arerp.kr/data/file///97784872848.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/024a0bbb6f7675b3a83243760ef46771/tozotufepajej.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/12672216973.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b29a6bc1f82---perituxitisodol.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/vegir.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/jkukglmsknmagmnf2r9fgv80e2/23221874809.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607987c80ab20---wisuvisilekonomebax.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/zozejalozefotituganovenin.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/nq4d2d60uac5sq273uef4v6g37/debid.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021050411150473499.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84c42d643d---wixaturuboxediripuzuzu.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/901e2fc05cff0222455b3b28b7ad5eae/jewozina.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/44193520161.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2348d0ba---sitepivudewozakopot.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/tmr9it2kdpu98f1bqf23h1q0s3/70605330071.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/57618585090.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8c5d4ba05---lomom.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/1487159709.pdfIn PDF document text
    • http://huiking.cn/uploads/file/200958328743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=chapter+2+quiz+1+geometry+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD283 17312 bytes
SHA-256: d9e541e2609e318351f12bcff974f5cd58ee442e4700937acec045f7b5769161
font_01_sfnt_off0000ffad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C4 11364 bytes
SHA-256: 48d18ec9c43e7e6294b4a629750fa5815223c5351a22bf02703f4186ab57cce1

Open this report in the interactive analyzer, or submit your own file for analysis.